Advertisement
Description
The TC1504 Fiber Optic Modem links data communication equipment requiring an RS-422A interface. It
supports synchronous data speeds (with an external clock) up to 2.048 Mbps and is equipped with a male
DB-37 connector. A four-position DIP Switch provides for Local & Remote Loopback functions, Slave
Clock operation and DCE/DTE device selection. There are six LED indicators that reflect operational status
such as Terminal Clock (TT), Transmit data (SD), Receive clock (RT), Receive data (RD) and DC power
supply.
The TC1504 is available in either Multimode or Single Mode versions. The Single Mode version supports
transmission distances up to 30km over Single Mode (1310nm) fiber optic cable. Fiber optic connectors can
be either ST or (FC optional) type.
Operational Theory
The TC1504 latches onto the RS-422/RS-449 data by the received clock signal (from user's equipment) to
produce an encoded optic signal (with an embedded clock). The composite optic signal is then transmitted
by the optic transmitter through the optic cable to a remote TC1504's optic receiver. The received optic signal
is processed and decoded to separate data and clock from the composite optic signal and then transmitted
out to a remote device.
Electrical Specifications & Virtual Connection
Interface:
RS-422/RS-449
Data Rate:
Synchronous DC to 2.048 Mbps
Connector:
DB37 Male (DCE/DTE switchable)
Power Requirements
A. The TC1504 is designed to draw very low power from an external power adapter.
The input DC voltage is from 9V to 12V and current is 220mA to 300mA for the
850nm and 1310nm versions.
B . Should an external power adapter require replacement, use one with the following
specifications: 12VDC @800mA with a terminal block connector. You may order
it from TC Communications.
−3−
TC1504 User's Manual
Rev. 1.5 (A0.1)
+
-
Advertisement
